"One thing I know a lot about is the legal definition of fraud," Justice Arthur Engeron said as he gaveled court into session prior to the start of opening statements.

Engoron opened the proceedings after allowing cameras in to document the scene in the courtroom: Trump, arms folded, flanked by his legal team; Engeron on the bench; and throngs of reporters and spectators in the gallery.

"I've promised to do my best despite my lame attempts at humor," Engeron said in a brief opening statement. "I take my job very seriously."

The trial is expected to last through Dec. 22, Engeron said, and suggested he would attempt to keep a low profile after today.

"For the next three months, I hope the only words I will mutter are 'Sustained,' 'Overruled,' and 'Let's take a 10-minute break,'" he said.

Opening statements are underway in former President Trump's $250 million fraud trial.

Trump is seated between his attorneys Clifford Robert, Alina Habba and Christopher Kise.

Trump and his co-defendants face a bench trial, meaning that the sole arbiter of the case is Judge Arthur Engoron instead of a jury.

Former President Trump has taken a seat in the courtroom for the start of the trial.

"The crime is against me," he told reporters outside the courtroom before he made his way inside.

He denounced the case in now-familiar terms, criticizing state Attorney General Letitia James as she sat inside the courtroom.

Trump also accused Judge Arthur Engoron of failing to account for the full value of his real estate portfolio, asserting his Mar-a-Lago estate is worth "50 to 100 times more" than the judge's decision for partial summary judgment said last week.

"We have other properties, the same thing. So he devalued everything," Trump said. "We have among the greatest properties in the world. and I have to go through this for political reasons."

Engoron decided Trump's statements of financial condition were fraudulent, but Trump said, "We have a clause in the contract that says, essentially, buyer beware."

Former President Trump, speaking to reporters on his arrival at the lower Manhattan courthouse, said the trial is a witch hunt resulting from his standing in the presidential polls.

"This is a continuation of the greatest political witch hunt of all time," he told reporters outside the courtroom.

Trump said he is innocent of the accusations and that his portfolio has a much higher value than what the attorney general alleges.

Trump's attorney Chris Kise hammered away at the New York attorney general's request for a fine of $370 million, calling the request "pure speculation" in his closing argument.

"You can't just make up a number in the sky," Kise argued, criticizing the New York AG for stepping into private transactions.

"The attorney general is going to come along ten years later because she does not like Donald Trump," Kise said.

Arguing that Trump's main lender at Deutsche Bank was happy to do business with the Trump Organization despite accusations that Trump overvalued his assets, Kise said that the state is attempting to rely on expert testimony due to a lack of testimony from bankers alleging wrongdoing.

Judge Engoron intervened twice during Kise's argument to cast doubt on the claim that happy bankers mean there was no wrongdoing.

"If the bank doesn't say it's material, then it's simply not material," Kise responded.

"That's not logically correct," Engoron said. "You can't just get a witness to say it was not material to us, so it was not material."

Kise also spent a significant portion of his closing statement criticizing former Trump attorney Michael Cohen, who he argued was the only witness to support the attorney general's claim of a conspiracy to defraud lenders.

"We have an individual who comes into the courtroom and lies right in front of you, and the attorney general wants you to find him credible," Kise said regarding Cohen reversing his testimony during the trial.